Rubber masticator



C. C. MOSHER.

' RUBBER MASTICATOR- 'APPLICATION. FILED MAR; 25 192 2.

lP temea Nov. 141, 1922; v

8 SHEETS-SHEET 1.

Cf C/Wosizerg c. c. MOSHER, RUBBER MASTICATOR. APPLICATION FILEDMAR.25,1922:

, 8 SHEETS-SHEET 2.

c. C.'MOSHER RUBBER MASTICATOR.

APPLICATION FILED'MAR-ZS, 1922- 1,435,616., I v Patented Nov. Ml, 11922.

8 SHEETS-SHEET 3.

mum doc Patented Nov. 14, 1922,

warren; stare PATENT CLIFFORD o. 'IVIOSHER, or LIMA, OHIO.

RUBBER MASTICATOR.

Application filed March 25, 1922. Serial No. l6,577.

a citizen of the United States, residing at Lima, in the county of Allenand State of Ohio, have invented new and useful Improvements in RubberMasticators, of which the following is a specification.

This invention relates to machines for mixing and kneading plasticmaterials, more especially rubber compounds, and consists in certainimprovements I have made to the machines covered by my Patents N0.

, 1,371,046 of March 8, 1921, and No. 1,396,138

of Nov. 8, 1921, and known as rubber masticatorsj The principal elementsof the presentmachine are the same as those of the said earliermachines, and the present improvements are directed to the means forralsmg and lowering the frame and weight off and onto the trough neck,said means acting 'at the same time to tilt the trough, to the means forraising and lowering the weight in the frame, and to the form andstructure of the weight and the provisions for feed- -1ng the materialstherethrough' into the trough.

The improved machine is illustrated in 'the accompanying drawing, inwhich,

Fig. 1 is "a plan view,

Fig. 2 is a vertical section from front to rear, and

Fig. 3 is a vertical sectionat right angles to Fig. 2.

In these views, the trough is marked 10, its upstanding rectangular neck11, with external flange 12 at its top. On said flange fits the flange14: of the frame or hopperbox 15, said flanges being provided with atongue-and-groove connection .13. The flange 14, it willbe noticed,isexternal' on the front and rear walls of the frame and internal on theside walls thereof}, The top surfaces of the two internal flanges, seeFig. 3, constitute seats 16 for the correspondingly inclined shoulders17 of the hopper weight 18 when it is in its lowest position. The

portion of the vhopper-weight below said shoulders fits slidably in theneck of the trough. while the portion thereof above the shoulders fitsslidably in the frame. Racks 30 slide in slots in the side walls of thehopper-weightand in guides 19 on the frame and are connected to theshoulders 17 of the weight-by bolts 22, passed through a crossbar 21 andsurrounded by a strongspring by "a worm 31 'on a short shaft 32, itselfdriven through worm gearing 33 by the motor 3e. All this mechanism, fromthe pinions 2a to the motor 34, is carried on the frame 15 and is raisedand lowered with it by. the four corner screws 35, journalled inuprights .36 of the machine frame and threaded fi'nto lugs 37 of theframe 15, said screws being simultaneously rotated by the chain drive38, actuated by the motor 39. It will be seen that, when the clutch 29is engaged and the motor 34 rotates in one direction, the pinions 24will force the racks, and through the springs 23 the weight 18,downwardly, causing pressure on the ma terial in the trough butpermitting the weight to rise slightly in case of excess pressure. Bydisengaging the clutch the weight is leftfree to rise and fall and, by.rot-ating the motor 34 in the opposite direction, the weight can beraised out of the trough neck. The extreme upward and downward travel ofthe weight is controlled by limit switches of a well known kindconnected to stop the motor.

The frontwall of the trough has a feed opening provided with a hingedcover 40,-

to cause a tumbling or turning over movement of the material and preventa mere sliding movement thereof. The means for actuating the valve 45consists of a shaft 16, carrying arms 47, connected to the valve bylinks 48 of such length that the valve is locked inits closedposition-and also in Fig. 2-by reason of said arms and links comlng intoalinement. Shaft 46 is driven through a chain 49 from short shaft 50, on

its raised position shown in dotted lines in the squared end of whichfits a crank handle 51, shown in dotted lines in Fig. 3. Fig. 2 alsoshows in dotted lines the uppermost position of the weight.

On the outside of the front wall of the weight I mount an oilreservoir-32, from which a valved pipe 53 leads through the bottom ofthe weight into the trough. while 54: represents a thermometer toindicate the temperature of the inside of the trough, it being connectedthereto by a pipe 56. 57 represents a gage to indicate the amount of oilin the reservoir. 58 is a pressure-relief valve, connected to thetroughthrough the weight by a pipe 59 and manually controlled by the handwheel and shaft 60.

The trough is tilted simultaneously with the raising of the frame 15, bymeans of nuts 61. travelling on the two rear screws and connected tolugs 62 on the bottom of t in Fig. 2.

Having thus described my invention, what I claim is I 1. In a mixingmachine, the combination with the tiltable trough and a frame adapted tofit on the neck thereof during the operation, of means to raise saidframe off said neck and to simultaneously tilt the trough.

2. In a mixing machine, the combination with the tiltable trough and aframe adapted to fit on the neck thereof during the operation, of screwsto raise and lower said frame and connections from two of said screws totilt the trough.

3. In a mixing machine, the combination 'with the tiltable trough and aframe adapted to fit on the neck thereof during the operation, of fourscrews engaging the corners of said frame to raise and lower it,travelling nuts on two of said screws, and connections from said nuts tothe trough whereby the lattfiar is tilted as said frame is raised orlowere 4. In a mixing machine, the combination with the tiltable troughand a frame adapted to fit on the neck thereof during the operation, offour fixed-axis screws threaded in corner lugs on said frame, powermeans to rotate said screws, a nut on each of the two rear screws, lugson the bottom of the trough, and arms connecting said nuts and lugs,whereby the trough is tilted simultaneously with the raising or loweringof said frame.

opening and manual means 5. In a mixing machine, the combination withthe tiltable trough and a frame adapted to fit on the neck thereofduring the operation, of a hopper-weight slidable in. said -of ahopper-weight slidable in said frame and neck, power means carried bysaid frame and operatively connected to said hopperweight to raiseand'lower the same, a clutch in said connections, and means to cushionthe downward movement of said hopperweight.

7. In a mixing machine, the combination with the tiltable trough and aframe adapted to fit on the neck thereof during the operation, of ahopper-weight slidable in said frame and neck, racks on the sidewalls ofsaid hopper-weight, a motor carried by said frame, and connectionsincluding a clutch between said motor and racks.

8. In a mixing machine, the combination with the tiltable trough and aframe adapted to fit on the neck thereof during the operation, ofahopper-weight slidable in said frame and neck, racks 'slidably-mountedon the side walls of said hopper-weight, springs between the latterandsaid racks, a motor carried on said frame, pinions engaging said racks,and connections including a clutch from said motor to said pinions.

9. In a mixing machine, the combination with the tiltable trough and aframe adapted to fit on the neck thereof durin the opera-- tion, of ahopper-weight slida le in said frame and neck, means carried by saidframe to force said hopper-weight downwardl springs to allow saidhopper-weight to .yie d upwardly, and means to raise said frame andhopper-weight off said neck.

10. In a mixing machine,.. the combination with the trough and. themixing blades therein, of a hopper-weight slidable in the neck of saidtrough and having a central feed. opening in its bottom, the surface ofsaid bottom being cylindrically concaved 011 each side of said opening,and a vertically movable valve to control said opening.

11. In a mixing machine, the combination with the trough and the mixingblades therein, of ahopper-weight slidable in the neck of the trough andhaving a central feed opening in its bottom, the surface of said bottomon each side of said opening being cylindrically concaved and serrated,a valve to control said to actuate said valve.

12. In a mixing machine, the combination with the troughand the mixingblades therein, of a hopper-weight slidable in the neck of the troughand having a central longitudinal feed opening in its bottom,.a valvecontrollin said opening, a shaft journalled in the wa ls of saidhopper-weight, crank-arms on said shaft,-links connecting said armstosaid valve, and manual means to rotate said shaft.

13. In a mixing machine, the combination with the mixing trough havingan ,upstand ing rectangular neck outwardly flanged at its top, of aframe having an at its bottomfitting on 'saidneck flan a' hopper-weightthe lower portioni'ofw ich fits in said neck while itsupper portion fitsin said frame, the shoulder between said porneck thereof,

tions seating on the upper side of said inturned flange, means 'to raiseand lower said hopper-weight in said frame' and neck, and means 'toraise and lower said frame and hopper-Weight; ofl and onto said neck.

14. In a mixing machine, the combination with the trough, of a-framefitting on the a hopper-weight. s'lidably fittin said frame and neck,the front and rear inside walls of said hopper-weightsloping 25 to anoutlet opening in the bottom thereof, a

feed opening at the top of said hopper-weight,

a valve controlling the outlet opening, ex-

ternal means to control, said valve manually,

an oil reservoir on said hopper-weight, and a; reservoir through thebottom of said hopper-weight valved pipe leading from" said into thetrough.

inturnedfiange forms continuations of means to raise and lower saidhopper onto sald neck, and connectlons from sald- 15:;A mixing machinecomprising two parallel semi-cylindrical portions, a shaft ournalled inthe axis-of each of "said portions,'a mixing blade on each shaft, meansto drive said shaft in opposite directions, said trough having anupstanding rectangular neck, a weight sliding in said neck and.hav-

ing a central feed opening -in its bottom, the surface of the latteron-ea'oh side of said open ng forming a continuation of-the S1115,

per and closure mounted to fit on the neck of said trough,.mean's-toraise and lower said closure in said hopper,

a motor carried bj said hopper to actuate said means, power ff andpowermeans to said trough to tilt the latter. In testimony whereof Ihave hereunto set myhand.

Witnesses:

' HLG, COLEMAN, A. J. ILLIEZ.

- CLIFFORD o. MOSHER;

